Chemical Engineering Thermodynamics - Study Mode
[#306] Which one is true for a throttling process?
Correct Answer
(B) The inversion temperature is different for different gases
Explanation
Solution: Different gases will have different inversion temperatures usually the hydrogen and helium will have very low maximum inversion temperatures so, cooling by using throttling for these gases is slightly difficult.
[#307] Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . °K
Correct Answer
(B) ∞
Explanation
Solution: During phase changes the temperature of the substances doesn’t increase instead the given thermal energy is used to break the intermolecular bonds and helps the substance to transfer from one phase to other phase. So, during this process the substance seems like an object having infinity thermal capacity because although we are transferring heat but the temperature is not raising.
[#308] The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
Correct Answer
(C) Same as
Explanation
Solution: Lavoisier and laplace law : the law states that the quantity of heat which must be supplied to decompose a compound in to its elemental form is equal to the amount of heat evolved during the formation compound from its element assuming no losses involved during both process.
[#309] Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
Correct Answer
(A) The same
Explanation
Solution: Lavoisier and laplace law : the law states that the quantity of heat which must be supplied to decompose a compound in to its elemental form is equal to the amount of heat evolved during the formation compound from its element assuming no losses involved during both process.
[#310] In case of the decomposition of hydroiodic acid (2H$$I$$ ⇋ H 2 + $${{I_2}}$$), addition of H 2 (at equilibrium condition) will
Correct Answer
(C) Diminish the degree of dissociation of H$$I$$
Explanation
Solution: Lechalters principle: Actually for an equilibrium reaction on increasing the reactant concentration the equilibrium shifts towards the right and therefore the reactants gets more dissociated and products concentration increases but here we are increasing the product $$left( {{H_2}}
ight)$$ xa0concentration so the equilibrium shifts towards left and increases the formation of $$2HI$$ xa0there by decreasing the dissociation of $$HI$$.